Error
Error Code:
3200
MySQL Error 3200: User-Defined Function Execution Failure
Description
This error indicates that a User-Defined Function (UDF) invoked within MySQL has failed to execute successfully. It typically occurs when the MySQL server attempts to load or run a UDF but encounters an underlying problem with the function's code, its dependencies, or the server environment.
Error Message
%s UDF failed; %s
Known Causes
4 known causesMissing or Corrupt UDF Library
The external shared library file for the UDF (e.g., .so or .dll) is either not found in the expected directory, is corrupt, or was not correctly registered with MySQL.
Internal UDF Code Error
The custom C/C++ code within the User-Defined Function contains a bug, a runtime error, or an unhandled exception that causes the function to crash during execution.
Insufficient File System Permissions
The MySQL server process lacks the necessary read or execute permissions for the UDF's shared library file or any other external files it needs to access.
Unmet External Dependencies
The UDF relies on other system libraries or components that are not installed, are not the correct version, or are otherwise inaccessible in the MySQL server's operating environment.
Solutions
3 solutions available1. Verify UDF Installation and Permissions medium
Ensure the User-Defined Function (UDF) is correctly installed and accessible by the MySQL user.
1
Identify the UDF that is failing. The error message '%s UDF failed; %s' will typically show the name of the UDF in the first placeholder.
2
Check if the UDF library file (e.g., `.so` on Linux, `.dll` on Windows) is present in the MySQL plugin directory. The location of this directory can be found by querying the `plugin_dir` system variable.
SHOW VARIABLES LIKE 'plugin_dir';3
Confirm that the MySQL server process has read and execute permissions on the UDF library file. On Linux, you can use `ls -l` to check permissions and `chmod` to adjust them if necessary. For example, to grant read and execute permissions to the owner, group, and others:
chmod 755 /path/to/your/udf_library.so4
Ensure the MySQL user executing the UDF has the necessary privileges. While UDFs are generally executed with the privileges of the caller, some UDFs might have specific permission requirements. Review the UDF's documentation.
5
If the UDF was recently installed or updated, restart the MySQL server to ensure it's properly loaded.
sudo systemctl restart mysql # On systems using systemd2. Examine UDF Dependency Issues advanced
Troubleshoot if the UDF relies on external libraries that are missing or incompatible.
1
Determine if the failing UDF has any external library dependencies. Consult the UDF's documentation or source code.
2
On Linux, use `ldd` on the UDF library file to list its dependencies. Any missing libraries will be marked as 'not found'.
ldd /path/to/your/udf_library.so3
Install any missing dependencies using your system's package manager (e.g., `apt`, `yum`, `dnf`).
sudo apt-get install <dependency_package_name>4
Verify that the installed dependency libraries are compatible with the UDF and the system's architecture (32-bit vs. 64-bit).
5
If the UDF was compiled from source, ensure it was compiled against the correct versions of its dependencies for your MySQL installation.
3. Check UDF Functionality and Input Validation medium
Investigate potential issues within the UDF's logic or how it's being called.
1
Review the second placeholder in the error message: '%s UDF failed; %s'. This often contains specific error details from the UDF itself, which can be crucial for diagnosis.
2
Examine the SQL query or stored procedure that is calling the UDF. Ensure the arguments being passed to the UDF are of the correct data type and format as expected by the UDF.
3
If the UDF performs complex operations or interacts with external resources, consider isolating the UDF call to a simple test query to rule out interference from other parts of the query.
SELECT your_udf_function(arg1, arg2, ...);4
If you have access to the UDF's source code, review it for potential bugs, unhandled exceptions, or resource leaks that might lead to execution failures.
5
Check MySQL error logs for more detailed information related to the UDF execution failure. The location of the error log can be found in the `log_error` system variable.
SHOW VARIABLES LIKE 'log_error';